My pond was built in July so still early on but it has blanket weed!! Horrible stuff!! I have got 2 straw bales and 2 pots of oyster shell in the pond but it dosnt seem to have done anything. Does it die back in the winter? How do I get rid of it and why have I got it in the pond? Someone said to me if I put a fountain in the pond it would get the water moving and that would get rid of it? Is this true?